Dalton's Atomic Theory
Chapter Name : Some Basic Concepts Of Chemistry |
Sub Topic Code : 102_11_01_06_01 |
Topic Name : Dalton's Atomic Theory |
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Sub Topic Name : Dalton's Atomic Theory |
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Introduction
Dalton’s Atomic Theory: • Each element is made up of tiny particles called atoms. • The atoms of the same element are identical; the atoms of different elements are different. • Chemical compounds are formed when atoms of different elements combine with each other in fixed ratios. • All chemical reactions are due to combination or separation of atoms. Atoms are neither created nor destroyed.
Pre-Requisites:
Theory, postulate, compound, element
Activity:
Sugar cube dissolving in a cup of tea or coffee.
Real Life Question:
What is water or salt or wood made of? How does salt dissolve in water? How does a sugar cube mix inside a cup of tea?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Atomic theory postulates | Each element is made up of atoms. Atoms combine to make compounds. Atoms of the same element are identical. Atoms combine or dissociate in chemical reactions. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Water, sugar, salt | Mix a spoon of salt or sugar inside a glass of water. See how the sugar or salt dissolves in water. |
Real life uses :
Any reaction e.g. salt mixing with water
Places to visit :
Kitchen, garage, park, etc
Practical examples around us
| Examples | Explainations |
|---|---|
| Sugar dissolving in a cup of tea | Atoms of elements of sugar molecule combine with the atoms of the molecules of water making the sugar mix inside water. |
What you learn in Theory:
Atom is the main particle which makes everything and causes all chemical reactions to take place.
What you learn in Practice:
All substances are made up of atoms of different elements. Atoms of different elements can combine or break apart.